Animals belonging to the order $Rodentia$ have:

Which of the following mammals is adapted for aquatic life?

Which of the following phyla is not included in invertebrates?

The long neck of a camel is due to:

What is common among whales,bats,and rats?

Assertion : The duck-billed Platypus and the spiny ant-eater,both are egg-laying animals yet they are grouped under mammals.
Reason : Both of them have seven cervical vertebrae and $12$ pairs of cranial nerves.